body,table,th,tr,td,div,span,input,select,textarea,ul,li,dl,ol,dt,dd,form,p,hr,img,h1,h2,h3,h4,h5,h6{padding:0;margin:0;}
html{height:100%;}
body {font-family:"微软雅黑", Arial, Helvetica, sans-serif;line-height:normal;height:100%;}
html,body{-webkit-text-size-adjust: 100%;-webkit-tap-highlight-color: rgba(0, 0, 0, 0);}
*{box-sizing:content-box;}
ul,li{list-style:none;}
.clear:after{content:"";display:block;clear:both;}

a{text-decoration:none;}
input{border:none;outline:none;}
.rel-pos{position:relative;}
.abs-pos{position:absolute;}
.fix-pos{position:fixed;}
.border-box{box-sizing:border-box;}
.center-box{display:flex;justify-content:center;align-items:center;}
.center-box-x{display:flex;justify-content:center;}
.center-box-y{display:flex;align-items:center;}

html{font-size:10px}
@media screen and (min-width:321px) and (max-width:375px){html{font-size:11px !important;}}
@media screen and (min-width:376px) and (max-width:414px){html{font-size:12px !important;}}
@media screen and (min-width:415px) and (max-width:639px){html{font-size:15px !important;}}
@media screen and (min-width:640px) and (max-width:719px){html{font-size:20px !important;}}
@media screen and (min-width:720px) and (max-width:749px){html{font-size:22.5px !important;}}
@media screen and (min-width:750px) and (max-width:799px){html{font-size:23.5px !important;}}
@media screen and (min-width:800px){html{font-size:25px !important;}}